Not sure what Queen Chrysalis is doing there...
Discord: "What? This hot spring allows for mixed bathing."
Chrysalis: "Read the sign. It says that it allows for mixed SPECIES bathing."
Discord: "Well, since it's mixed species bathing, that means I can come in, can't I?"
Celestia, Luna, Cadence, and Chrysalis: *simultaneous facehoof*
Discord: Totally worth it
And why does Discord have to sneak in?
Consider the fact, they're wearing clothes almost never, I don't think that they have separated Mare/Stallion areas in bathrooms, hot springs or swimming areas in Equestria.
But it's still a nice drawing.
I wonder if Studio B will make an episode with hot springs some day.
Would be a nice opportunity for another joke like in S1E26.
Oh, and why looks Luna so jealous in this picture?
*sigh* this kinda stuff becomes confuseing when 99.9% of the Equestrian population comfortably walks around naked about 90% of the time.